Process and machine for vacuum bottle tubulating and piercing



May 15, 1951 Q ElSLER 2,553,135

PROCESS AND MACHINE FOR VACUUM BOTTLE TUBULATING AND PIERCING 3Sheets-Sheet 1 Filed Oct. 7. 1949 INVEN TOR.

A T TORNEY May 15, 1951 c. EISLER PROCESS AND MACHINE FOR VACUUM BOTTLETUBULATING AND PIERCING 3 Sheets-Shed 2 Filed Oct. 7. 1949 May 15, 1951c. EISLER 2, 53,13 PROCESS AND MACHINE FOR VACUUM BOTTLE TUBULAIING AND.PIERCING.

Filed Oct. 7, 1949 5 Sheets-Sheet 3 INVENTOR.

CHARLFJ 5/1115! BY I ATTORNEY v Patented May 1 1951 PROCESS AND MACHINEFOR VACUUM BOTTLE TUBULATING AND PIERGING Charles Eisler, South Orange,N. J.

Application October 7, 1949-, Serial No. 120,105

. The object of the invention is to provide means for practicallysimultaneously tubulating and piercing the outer blank of a vacuumbottle, the tubulated glass tube serving as a means for subsequentlyexhausting the vacuum space between inner and outer blanks of theassembled and sealed vacuum bottle.

. A further object of the invention is to provide a machine having novelmeans for holding the blank and tube in abutment and for seriallysubjecting the same to operations at stations of the machine to completethe tubulating and piercing operation, as hereinafter more fully setforth.

In the drawings:

Fig. 1 is a top plan view of a machine embodying the invention, showingthe sequence of operations, the positions of operation being seriallyindicated by Roman numerals I--XII, inclusive,

Fig. 2 is a partially sectional, elevational view of a machine embodyingthe invention, provided with non-rotative heads,

Fig. 3 is an elevational view showing the piercing operation,

. Fig. 4 is a fragmentary, vertical, partly sectional view, showing theexhaust tube positioned in its holder, in working contact with thebottom of the blank, as in the loading position I of Fig. 1,

Fig. 5 is a fragmentary, schematic View, showing the first step in theprocess of fusing the tube to the blank prior to piercing,

' Fig. 5A is a schematic view of parts shown in Fig. 5, showing theirform upon continued 'appli-' cation of heat,

Fig. 6 is a similar view of the parts subjected to the piercingoperation,

Fig. 7 is a similar view of the parts in the operation of glazing thepierced aperture, and

Fig. 8 is an elevational view, showing the means employed for tubulatingand piercing in a rotating head. a

In Fig. l of the drawings, the machine is shown provided with aplurality of heads, the number and disposition of which may be variedwithin the spirit and scope of the invention. The sequence ofoperations, designated by Roman numerals in Fig. 1, is:

I. Loading II. Pre-heating III. Pre-heating IV. Heating V. Heating VI.Tubulating and internal heating of blank VII. Piercing and glazing VIII.Annealing IX. Annealing 4 Claims. (Cl. 49-1) X. Annealing XI. CoolingXII. Unloading.

The machine comprises (see Figs. 1 and 2) the table It having legs H,and a spider l2 secured to the vertical shaft l3, and periodicallyrotated by an indexing device, such as Geneva wheel I4, driven by pawll5, mounted on vertical shaft IE to which is keyed the wormwheel llrotated by wormwheel I 8 on shaft l9. Shaft I 9 is preferably driventhrough reduction drives 28 and 2| by motor 22. Any other indexingdevice, such as barrel cam-intermittent gearing or the like, may beemployed, if desired.

The tubulating heads may be either of the non-rotatable (Fig. 3) or ofthe'rotatable (Fig. 8) type, the-choice being governed generally by thesize and diameter of the blank and the wall thickness, the rotatabletype of head being generally deemed best suited to large blanks of thickglass. If rotatable heads are employed, corresponding additions andmodifications may be readily made in the driving mechanism, such as areshown in some of the machines previously patented by me see, forexample, Patent 2,413,960 of January 7, 1947.

Fig. 3 shows a machine having a non-rotative head. The exhaust tube 24which is to be tubulated to the bottom wall of the blank 23 of U-shapedcross-section has (at the loading position I) been inserted into thebore 25 of the tube holder 26 (Fig. 4), the tube holder having thethreaded plug 21 having the head 28 for adjusting depth of theinsertion. The tube holder 26 is adjustable, as by setscrew 29, on thepost 30 mounted in the spider I2. 1 The threaded plug 2'! has the axialairhole 3| terminating in the conical mouth 32 for admission of a blastof compressed air'during the piercing (Fig. 6) operation. When theexhaust tube 24 is in place, the blank 23 is inserted into the openretaining collar 33 of blank retainer bracket 34 which is slidable onthe post 30 and provided with setscrew or similar means to engage thepost to fix its position thereon. The blank is moved downwardly until itrests atop the exhaust tube, as shown in Fig. 4. After loading, theblank passes serially to positions II, III, IV and V, where it ispreheated and heated by burners 35 and 36.

At position VI, inside heating of the bottom of the blank is effected bythe vertical burner 31 to which a gas mixture is fed by duct 38 and theflexible tube 39 which is connected to mixer 40 (Fig. 2) of the gas,oxygen and air ducts 4|, 42, 43, supplied from an outside source bypipes 4m,

42a, 43a (Fig. 1). Vertical gas duct 38 is secured by bracket 44 to thevertical shaft 45 slidable in support 46, and is raised and lowered byany desired or convenient means, such as the lever 4? fulcrumed inbracket 48 (Fig. 2), the end 41 of the lever being disposed in followingengagement with barrel cam G9 on wormwheel shaft !6. Any other means foractuating shaft 45 may be employed, such as a compressed air device,which would have the advantage of eliminating the barrel cam and lever.On raising shaft 45, the gas duct 38 and the burner 37. may be entirelybottom of said blank internally and for externally heating the same, tofuse the same to the tube and seal the same at the point of abutmenttherewithdrawn from the blank 23, as indicated in dotted lines in Fig.3.

At position VI (Fig. 5), the vertical burner 31' is lowered into theblank 23 and the inside bot tom of the blank is heated, the outsidethereof being kept hot by burners 50. burner 37 heats the tubulationjuncture T and makes a weakened cavity (56, Figba) which may befractured to define an opening 6% in the bottom of the blankcommunicating with the tube 24, or punctured as hereinafter set forth,the bottom wall of the blank being weakened (or rendered very plastic atleast, at 66). passes to position VII where the flame from the burner 3?is partially turned off and a blast of air is passed through the duct 3!in plug 21 and so through the exhaust tube and the bottom of the glassblank, thus perforating it at 555 as shown in Fig. 6. As soon as theblast of air is shut ofi by means of economizer til-the flame of burner37 effects the glazing of the perforation 65 and its first annealing.Complete annealing of a large blank would best be effected by a third,similar device, at position VIII, but, with a small blank, this wouldnot be necessary and outside annealing by burners 59 is found to besufiicient. At positions VIII, IX, X, further annealing is effected byburners 52; the tubulated blank is then allowed to cool at position XIand is unloaded at position XII.

The rotating form of head is shown in Fig. 8 wherein the bracket 54 isshown'provided with posts 53 on which are adjustably mounted the openblank retainer brackets 55 and the tube holder 26. The bracket 54 iskeyed to the sleeve shaft 56 which is rotatable on the hollow shaft 51'provided with duct 58 for the passage of compressed air from the supplyduct 55. The bracket 54 is rotated by means, such as the cone pulleys 60and SI, rotation being stopped at the loading and unloading positions bythe head stop '62 engaging the stop rail 63; the cone pulley BI isdriven by the suitable means, such as the sprocket claim as new anddesire to secure by Letters Patent is The flame from 1 The blank then,-

ill

with and to form a cavity in the bottom of said 1 blank depending intosaid tube, and means for passing a pressure agent through said tube topierce the said cavity to form an aperture at the tubulating juncture ofsaid tube and blank.

2. The method of tubulating an exhaust tube having open ends to thelower, closed end of a blank U-shaped cross-section, which consists in Ivertically disposing the U-shaped blank with its closed end lowermost,positioning the exhaust tube vertically therebelow in abutment with theclosed end of the blank, heating the closed end of the tube internallyand heating the exhaust tube and said closed end at their abutment areasto fuse the same and to weaken the closed end of the tube in thatportion thereof enclosed by of the tube internally and simultaneouslypassing a blast of air through the tube and against the weakened cavityto perforate the same.

3. In the method of tubulating an exhaust tube having lower ends to aclosed end of the blank having a U-shaped cross-section, as set forthin. claim 2, an additional step comprising discontinuing the supply ofthe blast of air through the exhaust tube and increasing the internalheating of the blank to effect glazing of the perforated area andsubsequently annealing the tube and blank at their fused areas.

4. In the method of tubulating an exhaust tube having lower ends securedto a closed end of the blank, having a U-shaped cross-section as: set

forth in claim 2, an additional step comprising discontinuing the supplyof the blast of air through the exhaust tube and heating theblank'interiorly at the perforated area to effect glazing thereof.

CHARLES EISLER;

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

